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Depue, Village of

Sewage treatment plant, Depue, Illinois. NPDES permit IL0023523, in force until Dec 31, 2026. Last 12 months: over a limit 17 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: outfall 001 form 0 monthly (24 values), outfall INF form L monthly (4 values)
Renewal application due
Jul 4, 2026 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
6 values over a limit, 0 required values missing, 2 of 24 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

All 17 values over a limit
Period endingParameterReportedLimitOver by
March 2026Nitrogen, ammonia total [as N], monthly average.91 mg/L≤ .8 mg/L14%
March 2026Solids, total suspended, daily maximum45 mg/L≤ 24 mg/L88%
March 2026Solids, total suspended, monthly average14 mg/L≤ 12 mg/L17%
April 2026Nitrogen, ammonia total [as N], monthly average1.05 mg/L≤ .8 mg/L31%
May 2026Nitrogen, ammonia total [as N], monthly average2.07 mg/L≤ .8 mg/L159%
May 2026Nitrogen, ammonia total [as N], weekly average2.37 mg/L≤ 2 mg/L19%
June 2026Nitrogen, ammonia total [as N], monthly average1.9 mg/L≤ .6 mg/L217%
June 2026Nitrogen, ammonia total [as N], monthly average5.64 lb/d≤ 4.8 lb/d18%
June 2026Nitrogen, ammonia total [as N], weekly average1.96 mg/L≤ 1.5 mg/L31%
July 2026Chlorine, total residual, daily maximum.07 mg/L≤ .05 mg/L40%
July 2026Nitrogen, ammonia total [as N], monthly average1.44 mg/L≤ .6 mg/L140%
July 2026Nitrogen, ammonia total [as N], weekly average1.95 mg/L≤ 1.5 mg/L30%
August 2026Chlorine, total residual, daily maximum.07 mg/L≤ .05 mg/L40%
August 2026Nitrogen, ammonia total [as N], monthly average1.71 mg/L≤ .6 mg/L185%
August 2026Nitrogen, ammonia total [as N], monthly average5.53 lb/d≤ 4.8 lb/d15%
August 2026Nitrogen, ammonia total [as N], weekly average1.9 mg/L≤ 1.5 mg/L27%
August 2026Oxygen, dissolved [DO], monthly average minimum5.4 mg/L≥ 5.5 mg/L2%

Limits in force (89)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]monthly average minimum≥ 5.5 mg/LJan, Feb, Aug, Sep, Oct, Nov, Dec001
Oxygen, dissolved [DO]minimum weekly average≥ 4 mg/LJan, Feb, Aug, Sep, Oct, Nov, Dec001
Oxygen, dissolved [DO]minimum weekly average≥ 6 mg/LMar–Jul001
Oxygen, dissolved [DO]daily minimum≥ 3.5 mg/LJan, Feb, Aug, Sep, Oct, Nov, Dec001
Oxygen, dissolved [DO]daily minimum≥ 5 mg/LMar–Jul001
pHminimum≥ 6 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 12 mg/Lall year001
Solids, total suspendeddaily maximum≤ 24 mg/Lall year001
Solids, total suspendedmonthly average≤ 96 lb/dall year001
Solids, total suspendeddaily maximum≤ 192 lb/dall year001
Nitrogen, ammonia total [as N]monthly average≤ .8 mg/LApr001
Nitrogen, ammonia total [as N]monthly average≤ 2.9 mg/LJan001
Nitrogen, ammonia total [as N]monthly average≤ .8 mg/LMay001
Nitrogen, ammonia total [as N]monthly average≤ .6 mg/LAug001
Nitrogen, ammonia total [as N]monthly average≤ 2.9 mg/LDec001
Nitrogen, ammonia total [as N]monthly average≤ .6 mg/LJun001
Nitrogen, ammonia total [as N]monthly average≤ .8 mg/LSep001
Nitrogen, ammonia total [as N]monthly average≤ 2.9 mg/LFeb001
Nitrogen, ammonia total [as N]monthly average≤ .6 mg/LJul001
Nitrogen, ammonia total [as N]monthly average≤ .8 mg/LOct001
Nitrogen, ammonia total [as N]monthly average≤ 2.9 mg/LNov001
Nitrogen, ammonia total [as N]monthly average≤ .8 mg/LMar001
Nitrogen, ammonia total [as N]daily maximum≤ 3.2 mg/LApr001
Nitrogen, ammonia total [as N]daily maximum≤ 3.9 mg/LJan001
Nitrogen, ammonia total [as N]daily maximum≤ 3.2 mg/LMay001
Nitrogen, ammonia total [as N]daily maximum≤ 3.2 mg/LAug001
Nitrogen, ammonia total [as N]daily maximum≤ 3.9 mg/LDec001
Nitrogen, ammonia total [as N]daily maximum≤ 3.2 mg/LJun001
Nitrogen, ammonia total [as N]daily maximum≤ 3.2 mg/LSep001
Nitrogen, ammonia total [as N]daily maximum≤ 3.9 mg/LFeb001
Nitrogen, ammonia total [as N]daily maximum≤ 3.2 mg/LJul001
Nitrogen, ammonia total [as N]daily maximum≤ 3.2 mg/LOct001
Nitrogen, ammonia total [as N]daily maximum≤ 3.9 mg/LNov001
Nitrogen, ammonia total [as N]daily maximum≤ 3.2 mg/LMar001
Nitrogen, ammonia total [as N]monthly average≤ 6.4 lb/dApr001
Nitrogen, ammonia total [as N]monthly average≤ 23 lb/dJan001
Nitrogen, ammonia total [as N]monthly average≤ 6.4 lb/dMay001
Nitrogen, ammonia total [as N]monthly average≤ 4.8 lb/dAug001
Nitrogen, ammonia total [as N]monthly average≤ 23 lb/dDec001
Nitrogen, ammonia total [as N]monthly average≤ 4.8 lb/dJun001
Nitrogen, ammonia total [as N]monthly average≤ 6.4 lb/dSep001
Nitrogen, ammonia total [as N]monthly average≤ 23 lb/dFeb001
Nitrogen, ammonia total [as N]monthly average≤ 4.8 lb/dJul001
Nitrogen, ammonia total [as N]monthly average≤ 6.4 lb/dOct001
Nitrogen, ammonia total [as N]monthly average≤ 23 lb/dNov001
Nitrogen, ammonia total [as N]monthly average≤ 6.4 lb/dMar001
Nitrogen, ammonia total [as N]daily maximum≤ 26 lb/dApr001
Nitrogen, ammonia total [as N]daily maximum≤ 31 lb/dJan001
Nitrogen, ammonia total [as N]daily maximum≤ 26 lb/dMay001
Nitrogen, ammonia total [as N]daily maximum≤ 26 lb/dAug001
Nitrogen, ammonia total [as N]daily maximum≤ 31 lb/dDec001
Nitrogen, ammonia total [as N]daily maximum≤ 26 lb/dJun001
Nitrogen, ammonia total [as N]daily maximum≤ 26 lb/dSep001
Nitrogen, ammonia total [as N]daily maximum≤ 31 lb/dFeb001
Nitrogen, ammonia total [as N]daily maximum≤ 26 lb/dJul001
Nitrogen, ammonia total [as N]daily maximum≤ 26 lb/dOct001
Nitrogen, ammonia total [as N]daily maximum≤ 31 lb/dNov001
Nitrogen, ammonia total [as N]daily maximum≤ 26 lb/dMar001
Nitrogen, ammonia total [as N]weekly average≤ 2 mg/LOct001
Nitrogen, ammonia total [as N]weekly average≤ 1.5 mg/LAug001
Nitrogen, ammonia total [as N]weekly average≤ 2 mg/LApr001
Nitrogen, ammonia total [as N]weekly average≤ 1.5 mg/LJun001
Nitrogen, ammonia total [as N]weekly average≤ 2 mg/LMay001
Nitrogen, ammonia total [as N]weekly average≤ 2 mg/LSep001
Nitrogen, ammonia total [as N]weekly average≤ 1.5 mg/LJul001
Nitrogen, ammonia total [as N]weekly average≤ 2 mg/LMar001
Nitrogen, ammonia total [as N]weekly average≤ 16 lb/dOct001
Nitrogen, ammonia total [as N]weekly average≤ 12 lb/dAug001
Nitrogen, ammonia total [as N]weekly average≤ 16 lb/dApr001
Nitrogen, ammonia total [as N]weekly average≤ 12 lb/dJun001
Nitrogen, ammonia total [as N]weekly average≤ 16 lb/dMay001
Nitrogen, ammonia total [as N]weekly average≤ 16 lb/dSep001
Nitrogen, ammonia total [as N]weekly average≤ 12 lb/dJul001
Nitrogen, ammonia total [as N]weekly average≤ 16 lb/dMar001
Phosphorus, total [as P]monthly average≤ 8 lb/dall year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Chlorine, total residualdaily maximum≤ .05 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Chlorine, total residualdaily maximum≤ .05 mg/LMay–Oct001
Coliform, fecal generaldaily maximum≤ 400 #/100mLMay–Oct001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 20 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 80 lb/dall year001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 160 lb/dall year001
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all yearINF
Solids, total suspendedmonthly averagereport only (mg/L)all yearINF
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearINF
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearINF

How strict are these limits?

Cited limits by parameter: Illinois's rules and the federal ones.

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Your permit document is the final word. As JSON: /api/v1/permits/IL0023523 · MCP: https://passage-data.com/mcp